@article{MOMA_1993__115_4_178604,
     author = {Markus Stroppel},
     title = {Quasi-Perspectivities in {Stable} {Planes.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {183--190},
     publisher = {mathdoc},
     volume = {115},
     number = {4},
     year = {1993},
     zbl = {0786.51016},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1993__115_4_178604/}
}